diff --color -ru a/ssh_config.5 b/ssh_config.5 --- a/ssh_config.5 2022-07-12 15:05:22.550013071 +0200 +++ b/ssh_config.5 2022-07-12 15:17:20.016704545 +0200 @@ -373,17 +373,13 @@ causes no CNAMEs to be considered for canonicalization. This is the default behaviour. .It Cm CASignatureAlgorithms +The default is handled system-wide by +.Xr crypto-policies 7 . +Information about defaults, how to modify the defaults and how to customize existing policies with sub-policies are present in manual page +.Xr update-crypto-policies 8 . +.Pp Specifies which algorithms are allowed for signing of certificates by certificate authorities (CAs). -The default is: -.Bd -literal -offset indent -ssh-ed25519,ecdsa-sha2-nistp256, -ecdsa-sha2-nistp384,ecdsa-sha2-nistp521, -sk-ssh-ed25519@openssh.com, -sk-ecdsa-sha2-nistp256@openssh.com, -rsa-sha2-512,rsa-sha2-256 -.Ed -.Pp If the specified list begins with a .Sq + character, then the specified algorithms will be appended to the default set @@ -445,20 +441,25 @@ (the default), the check will not be executed. .It Cm Ciphers +The default is handled system-wide by +.Xr crypto-policies 7 . +Information about defaults, how to modify the defaults and how to customize existing policies with sub-policies are present in manual page +.Xr update-crypto-policies 8 . +.Pp Specifies the ciphers allowed and their order of preference. Multiple ciphers must be comma-separated. If the specified list begins with a .Sq + -character, then the specified ciphers will be appended to the default set -instead of replacing them. +character, then the specified ciphers will be appended to the built-in +openssh default set instead of replacing them. If the specified list begins with a .Sq - character, then the specified ciphers (including wildcards) will be removed -from the default set instead of replacing them. +from the built-in openssh default set instead of replacing them. If the specified list begins with a .Sq ^ character, then the specified ciphers will be placed at the head of the -default set. +built-in openssh default set. .Pp The supported ciphers are: .Bd -literal -offset indent @@ -474,13 +475,6 @@ chacha20-poly1305@openssh.com .Ed .Pp -The default is: -.Bd -literal -offset indent -chacha20-poly1305@openssh.com, -aes128-ctr,aes192-ctr,aes256-ctr, -aes128-gcm@openssh.com,aes256-gcm@openssh.com -.Ed -.Pp The list of available ciphers may also be obtained using .Qq ssh -Q cipher . .It Cm ClearAllForwardings @@ -874,6 +868,11 @@ The default is .Dq no . .It Cm GSSAPIKexAlgorithms +The default is handled system-wide by +.Xr crypto-policies 7 . +Information about defaults, how to modify the defaults and how to customize existing policies with sub-policies are present in manual page +.Xr update-crypto-policies 8 . +.Pp The list of key exchange algorithms that are offered for GSSAPI key exchange. Possible values are .Bd -literal -offset 3n @@ -886,10 +885,8 @@ gss-curve25519-sha256- .Ed .Pp -The default is -.Dq gss-group14-sha256-,gss-group16-sha512-,gss-nistp256-sha256-, -gss-curve25519-sha256-,gss-group14-sha1-,gss-gex-sha1- . This option only applies to connections using GSSAPI. +.Pp .It Cm HashKnownHosts Indicates that .Xr ssh 1 @@ -1219,30 +1216,25 @@ and .Cm pam . .It Cm KexAlgorithms +The default is handled system-wide by +.Xr crypto-policies 7 . +Information about defaults, how to modify the defaults and how to customize existing policies with sub-policies are present in manual page +.Xr update-crypto-policies 8 . +.Pp Specifies the available KEX (Key Exchange) algorithms. Multiple algorithms must be comma-separated. If the specified list begins with a .Sq + -character, then the specified algorithms will be appended to the default set -instead of replacing them. +character, then the specified methods will be appended to the built-in +openssh default set instead of replacing them. If the specified list begins with a .Sq - character, then the specified algorithms (including wildcards) will be removed -from the default set instead of replacing them. +from the built-in openssh default set instead of replacing them. If the specified list begins with a .Sq ^ character, then the specified algorithms will be placed at the head of the -default set. -The default is: -.Bd -literal -offset indent -sntrup761x25519-sha512@openssh.com, -curve25519-sha256,curve25519-sha256@libssh.org, -ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521, -diffie-hellman-group-exchange-sha256, -diffie-hellman-group16-sha512, -diffie-hellman-group18-sha512, -diffie-hellman-group14-sha256 -.Ed +built-in openssh default set. .Pp The list of available key exchange algorithms may also be obtained using .Qq ssh -Q kex . @@ -1351,37 +1344,33 @@ file. This option is intended for debugging and no overrides are enabled by default. .It Cm MACs +The default is handled system-wide by +.Xr crypto-policies 7 . +Information about defaults, how to modify the defaults and how to customize existing policies with sub-policies are present in manual page +.Xr update-crypto-policies 8 . +.Pp Specifies the MAC (message authentication code) algorithms in order of preference. The MAC algorithm is used for data integrity protection. Multiple algorithms must be comma-separated. If the specified list begins with a .Sq + -character, then the specified algorithms will be appended to the default set -instead of replacing them. +character, then the specified algorithms will be appended to the built-in +openssh default set instead of replacing them. If the specified list begins with a .Sq - character, then the specified algorithms (including wildcards) will be removed -from the default set instead of replacing them. +from the built-in openssh default set instead of replacing them. If the specified list begins with a .Sq ^ character, then the specified algorithms will be placed at the head of the -default set. +built-in openssh default set. .Pp The algorithms that contain .Qq -etm calculate the MAC after encryption (encrypt-then-mac). These are considered safer and their use recommended. .Pp -The default is: -.Bd -literal -offset indent -umac-64-etm@openssh.com,umac-128-etm@openssh.com, -hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com, -hmac-sha1-etm@openssh.com, -umac-64@openssh.com,umac-128@openssh.com, -hmac-sha2-256,hmac-sha2-512,hmac-sha1 -.Ed -.Pp The list of available MAC algorithms may also be obtained using .Qq ssh -Q mac . .It Cm NoHostAuthenticationForLocalhost @@ -1553,36 +1542,25 @@ The default is .Cm no . .It Cm PubkeyAcceptedAlgorithms +The default is handled system-wide by +.Xr crypto-policies 7 . +Information about defaults, how to modify the defaults and how to customize existing policies with sub-policies are present in manual page +.Xr update-crypto-policies 8 . +.Pp Specifies the signature algorithms that will be used for public key authentication as a comma-separated list of patterns. If the specified list begins with a .Sq + -character, then the algorithms after it will be appended to the default -instead of replacing it. +character, then the algorithms after it will be appended to the built-in +openssh default instead of replacing it. If the specified list begins with a .Sq - character, then the specified algorithms (including wildcards) will be removed -from the default set instead of replacing them. +from the built-in openssh default set instead of replacing them. If the specified list begins with a .Sq ^ character, then the specified algorithms will be placed at the head of the -default set. -The default for this option is: -.Bd -literal -offset 3n -ssh-ed25519-cert-v01@openssh.com, -ecdsa-sha2-nistp256-cert-v01@openssh.com, -ecdsa-sha2-nistp384-cert-v01@openssh.com, -ecdsa-sha2-nistp521-cert-v01@openssh.com, -sk-ssh-ed25519-cert-v01@openssh.com, -sk-ecdsa-sha2-nistp256-cert-v01@openssh.com, -rsa-sha2-512-cert-v01@openssh.com, -rsa-sha2-256-cert-v01@openssh.com, -ssh-ed25519, -ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521, -sk-ssh-ed25519@openssh.com, -sk-ecdsa-sha2-nistp256@openssh.com, -rsa-sha2-512,rsa-sha2-256 -.Ed +built-in openssh default set. .Pp The list of available signature algorithms may also be obtained using .Qq ssh -Q PubkeyAcceptedAlgorithms . diff --color -ru a/sshd_config.5 b/sshd_config.5 --- a/sshd_config.5 2022-07-12 15:05:22.535012771 +0200 +++ b/sshd_config.5 2022-07-12 15:15:33.394809258 +0200 @@ -373,17 +373,13 @@ then no banner is displayed. By default, no banner is displayed. .It Cm CASignatureAlgorithms +The default is handled system-wide by +.Xr crypto-policies 7 . +Information about defaults, how to modify the defaults and how to customize existing policies with sub-policies are present in manual page +.Xr update-crypto-policies 8 . +.Pp Specifies which algorithms are allowed for signing of certificates by certificate authorities (CAs). -The default is: -.Bd -literal -offset indent -ssh-ed25519,ecdsa-sha2-nistp256, -ecdsa-sha2-nistp384,ecdsa-sha2-nistp521, -sk-ssh-ed25519@openssh.com, -sk-ecdsa-sha2-nistp256@openssh.com, -rsa-sha2-512,rsa-sha2-256 -.Ed -.Pp If the specified list begins with a .Sq + character, then the specified algorithms will be appended to the default set @@ -450,20 +446,25 @@ indicating not to .Xr chroot 2 . .It Cm Ciphers +The default is handled system-wide by +.Xr crypto-policies 7 . +Information about defaults, how to modify the defaults and how to customize existing policies with sub-policies are present in manual page +.Xr update-crypto-policies 8 . +.Pp Specifies the ciphers allowed. Multiple ciphers must be comma-separated. If the specified list begins with a .Sq + -character, then the specified ciphers will be appended to the default set -instead of replacing them. +character, then the specified ciphers will be appended to the built-in +openssh default set instead of replacing them. If the specified list begins with a .Sq - character, then the specified ciphers (including wildcards) will be removed -from the default set instead of replacing them. +from the built-in openssh default set instead of replacing them. If the specified list begins with a .Sq ^ character, then the specified ciphers will be placed at the head of the -default set. +built-in openssh default set. .Pp The supported ciphers are: .Pp @@ -490,13 +491,6 @@ chacha20-poly1305@openssh.com .El .Pp -The default is: -.Bd -literal -offset indent -chacha20-poly1305@openssh.com, -aes128-ctr,aes192-ctr,aes256-ctr, -aes128-gcm@openssh.com,aes256-gcm@openssh.com -.Ed -.Pp The list of available ciphers may also be obtained using .Qq ssh -Q cipher . .It Cm ClientAliveCountMax @@ -685,21 +679,22 @@ .Cm GSSAPIKeyExchange needs to be enabled in the server and also used by the client. .It Cm GSSAPIKexAlgorithms +The default is handled system-wide by +.Xr crypto-policies 7 . +Information about defaults, how to modify the defaults and how to customize existing policies with sub-policies are present in manual page +.Xr update-crypto-policies 8 . +.Pp The list of key exchange algorithms that are accepted by GSSAPI key exchange. Possible values are .Bd -literal -offset 3n -gss-gex-sha1-, -gss-group1-sha1-, -gss-group14-sha1-, -gss-group14-sha256-, -gss-group16-sha512-, -gss-nistp256-sha256-, +gss-gex-sha1- +gss-group1-sha1- +gss-group14-sha1- +gss-group14-sha256- +gss-group16-sha512- +gss-nistp256-sha256- gss-curve25519-sha256- .Ed -.Pp -The default is -.Dq gss-group14-sha256-,gss-group16-sha512-,gss-nistp256-sha256-, -gss-curve25519-sha256-,gss-group14-sha1-,gss-gex-sha1- . This option only applies to connections using GSSAPI. .It Cm HostbasedAcceptedAlgorithms Specifies the signature algorithms that will be accepted for hostbased @@ -799,25 +794,14 @@ .Ev SSH_AUTH_SOCK environment variable. .It Cm HostKeyAlgorithms +The default is handled system-wide by +.Xr crypto-policies 7 . +Information about defaults, how to modify the defaults and how to customize existing policies with sub-policies are present in manual page +.Xr update-crypto-policies 8 . +.Pp Specifies the host key signature algorithms that the server offers. The default for this option is: -.Bd -literal -offset 3n -ssh-ed25519-cert-v01@openssh.com, -ecdsa-sha2-nistp256-cert-v01@openssh.com, -ecdsa-sha2-nistp384-cert-v01@openssh.com, -ecdsa-sha2-nistp521-cert-v01@openssh.com, -sk-ssh-ed25519-cert-v01@openssh.com, -sk-ecdsa-sha2-nistp256-cert-v01@openssh.com, -rsa-sha2-512-cert-v01@openssh.com, -rsa-sha2-256-cert-v01@openssh.com, -ssh-ed25519, -ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521, -sk-ssh-ed25519@openssh.com, -sk-ecdsa-sha2-nistp256@openssh.com, -rsa-sha2-512,rsa-sha2-256 -.Ed -.Pp The list of available signature algorithms may also be obtained using .Qq ssh -Q HostKeyAlgorithms . .It Cm IgnoreRhosts @@ -965,20 +947,25 @@ The default is .Cm yes . .It Cm KexAlgorithms +The default is handled system-wide by +.Xr crypto-policies 7 . +Information about defaults, how to modify the defaults and how to customize existing policies with sub-policies are present in manual page +.Xr update-crypto-policies 8 . +.Pp Specifies the available KEX (Key Exchange) algorithms. Multiple algorithms must be comma-separated. Alternately if the specified list begins with a .Sq + -character, then the specified algorithms will be appended to the default set -instead of replacing them. +character, then the specified methods will be appended to the built-in +openssh default set instead of replacing them. If the specified list begins with a .Sq - character, then the specified algorithms (including wildcards) will be removed -from the default set instead of replacing them. +from the built-in openssh default set instead of replacing them. If the specified list begins with a .Sq ^ character, then the specified algorithms will be placed at the head of the -default set. +built-in openssh default set. The supported algorithms are: .Pp .Bl -item -compact -offset indent @@ -1010,16 +997,6 @@ sntrup761x25519-sha512@openssh.com .El .Pp -The default is: -.Bd -literal -offset indent -sntrup761x25519-sha512@openssh.com, -curve25519-sha256,curve25519-sha256@libssh.org, -ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521, -diffie-hellman-group-exchange-sha256, -diffie-hellman-group16-sha512,diffie-hellman-group18-sha512, -diffie-hellman-group14-sha256 -.Ed -.Pp The list of available key exchange algorithms may also be obtained using .Qq ssh -Q KexAlgorithms . .It Cm ListenAddress @@ -1104,21 +1082,26 @@ file. This option is intended for debugging and no overrides are enabled by default. .It Cm MACs +The default is handled system-wide by +.Xr crypto-policies 7 . +Information about defaults, how to modify the defaults and how to customize existing policies with sub-policies are present in manual page +.Xr update-crypto-policies 8 . +.Pp Specifies the available MAC (message authentication code) algorithms. The MAC algorithm is used for data integrity protection. Multiple algorithms must be comma-separated. If the specified list begins with a .Sq + -character, then the specified algorithms will be appended to the default set -instead of replacing them. +character, then the specified algorithms will be appended to the built-in +openssh default set instead of replacing them. If the specified list begins with a .Sq - character, then the specified algorithms (including wildcards) will be removed -from the default set instead of replacing them. +from the built-in openssh default set instead of replacing them. If the specified list begins with a .Sq ^ character, then the specified algorithms will be placed at the head of the -default set. +built-in openssh default set. .Pp The algorithms that contain .Qq -etm @@ -1161,15 +1144,6 @@ umac-128-etm@openssh.com .El .Pp -The default is: -.Bd -literal -offset indent -umac-64-etm@openssh.com,umac-128-etm@openssh.com, -hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com, -hmac-sha1-etm@openssh.com, -umac-64@openssh.com,umac-128@openssh.com, -hmac-sha2-256,hmac-sha2-512,hmac-sha1 -.Ed -.Pp The list of available MAC algorithms may also be obtained using .Qq ssh -Q mac . .It Cm Match @@ -1548,36 +1522,25 @@ The default is .Cm yes . .It Cm PubkeyAcceptedAlgorithms +The default is handled system-wide by +.Xr crypto-policies 7 . +Information about defaults, how to modify the defaults and how to customize existing policies with sub-policies are present in manual page +.Xr update-crypto-policies 8 . +.Pp Specifies the signature algorithms that will be accepted for public key authentication as a list of comma-separated patterns. Alternately if the specified list begins with a .Sq + -character, then the specified algorithms will be appended to the default set -instead of replacing them. +character, then the specified algorithms will be appended to the built-in +openssh default set instead of replacing them. If the specified list begins with a .Sq - character, then the specified algorithms (including wildcards) will be removed -from the default set instead of replacing them. +from the built-in openssh default set instead of replacing them. If the specified list begins with a .Sq ^ character, then the specified algorithms will be placed at the head of the -default set. -The default for this option is: -.Bd -literal -offset 3n -ssh-ed25519-cert-v01@openssh.com, -ecdsa-sha2-nistp256-cert-v01@openssh.com, -ecdsa-sha2-nistp384-cert-v01@openssh.com, -ecdsa-sha2-nistp521-cert-v01@openssh.com, -sk-ssh-ed25519-cert-v01@openssh.com, -sk-ecdsa-sha2-nistp256-cert-v01@openssh.com, -rsa-sha2-512-cert-v01@openssh.com, -rsa-sha2-256-cert-v01@openssh.com, -ssh-ed25519, -ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521, -sk-ssh-ed25519@openssh.com, -sk-ecdsa-sha2-nistp256@openssh.com, -rsa-sha2-512,rsa-sha2-256 -.Ed +built-in openssh default set. .Pp The list of available signature algorithms may also be obtained using .Qq ssh -Q PubkeyAcceptedAlgorithms .